<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        //html元素.currentStyle.样式属性
        //getComputedSty(元素,null)
    </script>
    <style>
        #main{
            position: relative;
            float: right;
        }
        #adv{
            float: left;
            z-index: 1;
            padding-top: 100;
        }
    </style>
</head>
<body>
    <!-- <div id="a1" style="display:block">111111</div>
    <script>
        let a=document.getElementById(a1)
        let b=document.defaultView.getComputedStyle(a,null).display;
        console.log(a);
    </script> -->


        <div id="adv"><img src=""></div>
        <div id="main">
            <img src="" alt="">
            <img src="" alt="">
            <img src="" alt="">
        </div>
    

        <script>
            
        </script>
</body>
</html>